Needle holder for telautographic apparatus



April 17, 1928. 6 1,666,330

M. FERREE ET AL NEEDLE HOLDER FOR TELAUTOGRAPHIC APPARATUS Original Filed Jan. 31, 1925 wlylylmmgm a Patented Apr. 17, 1928.

NI ED STATES II, 01' m YCBK, N. Y., OHIO, ABSIGIOBS, BY nnmc'r AND IRENE ASSIGHKEITS, 1'0 T101! nuance, GJRPORATION 01' NEW YORK.

PATENT OFFICE.

AND JOSEPH OI moonwaa umna: HOLD IOB TELAUTOGBLPHIC mans-ma. A

Application lled January-81, "fig Serial 10.1367. Renewed September a1, 1am.

This invention relates to a new and improved holdingv mechanism for a needle adapted to be used in an apparatus for electrically transmitting ictures.

It has heretofore well-known that pictures could be transmitted by a series of electrical pulses by forming a; broken tone reproduction of the picture by means of a coating of insulatin material on a metal plate, and then moving a fine needle over the said broken coating while the said needle and the said plate were-connected to the opposite terminals of the source of electrical;

current. In a mechanism of this character whenever the needle contacts with a naked portion of the metal plate the circuit is closed and whenever it contacts with a portion of the insulating coating the circuit is broken.

One of the objects of this invention is to provide an improved and reliable mechanism for firmly holding the needle in position so that the needle can move towards and away from the plate with sufiicient freedom while it is rigidly and firmly held against any movement with t to its holder, save in a direction towar cr'away from the said plate.

Other objects of this invention will be described in the following description and drawings which illustrate a preferred embodiment thereof.

Fig. 1 is a sectional view showing the needle and the apparatus for holding vthe same. n

Fig. 2 is another sectional view showing the relationship between the needle and the :mitting apparatus is 'referably made of sensitized paper upon the receiving drum.

The needle N is mounted at the end of an angular blade spring 42 and this angular blade spring is mounted at the end of its sleeve 43 which is .slidably mounted within anouter sleeve 44 suitably connected to a fiber arm 40. The head 45 to which the blade s ring 42 is connected is held in the inner s eeve 43 by means of a set screw 46 and the position of the inner sleeve 43 in the outer sleeve 44 can be regulated by means of the set screw 47.

The needle N when it is used for transhard steeland when t e needle N is used for receiving a pictureit is preferably made of an allo pf latinum and iridium so as to be una ec by any chemical action.

It is highl impo should be he d in position with the proper degree of pressure against the broken tone plate used for transmitting the picture, and also a inst the paper on which the icture is to reproduced. The needle when used for transmitting purposes must bear firmly against the transmitting plate so as to have efiicient electrical contact with the.

naked metallic portions of the metal plate which is usually made of copper, and it must not bear so firmly against the transmitting plate so as to scratch the enamel on it. The an ar blade spring 42 together with the adjustment of the head 45 and of the inner sleeve 43 before mentioned is highly eflicient in producing the proper degree of pressure.

Fig. 2 illustrates how the needle N is caused to bear against the chemical paper rtant that the needle N 51 which is impregnated with a solution of starch, potassium iodide and potasium bromide and water. This chemical paper 51 is placed upon a pad 50 which is saturated with the same solution. The pad 50 and the chemical paper 51 are arranged upon a receiving drum 49 which is-revolved by any suitable mechanism not shown in the drawings. The needle N'and the receiving drum 49- are caused to have a relative movement in a direction parallel to the axis of the drum 49 by any suitable and well-known mechanism'which is not shown in the drawings. The action of the pad 50 which is made of a pure unsized paper consisting practically of pure cellulose is to cause the receiving paper 51 to remain moist for many hours so that this paper does not dry up too quickly,

so as to prevent long pictures from being efliciently received. The blade spring 42 is p rate with an arm by means of springs whose position can be controlled by means of the screw 36. The needle carrier comprises a metal drum 37 pivoted to the needle drum 30 at 28. The position of the arm 37 can be regulated by means of the screw 39. An arm made of fiber or other insulating material holds the sleeve 44 and this arm 40 is connected to the metal arm 37 by means of an ordinary bolt 41. The needle arm 30 is slidably mounted upon an arin 31.

A preferred embodiment of this invention has been described but it is clear that numerous changes and omissions could be made without parting from its spirit.

We claim: 1. In an apparatus for transmitting pictures by a series of electrical pulses, a drum adapted to carry chemical paper or the like, a needle mounted upon an angular blade spring arranged substantially perpendicular to the axis of the drum, and adjustable means for immovably holding the outer end of the said blade spring with respect to said drum, said adjustable means being movable in a direction towards and away from said drum.

2. In an apparatus for transmitting pictures by a series of electrical pulses, a drum adapted to carry chemical paper or the like, a needle mounted upon an angular blade spring which is substantially perpendicular signature.

MARVIN FERREE.

In testimony whereof I hereunto affix my signature.

JOSEPH WISSMAR. 

